@ Ian, sorry, I didn't refresh!
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
but yes, a VCR indeed is much closer to the device I'm thinking of. Are you implying they actually MAKE these things? Because you should link me up with one because I can't find anything using my google.... But that would be really neat!
@amspire
I think you aren't understanding me the same as Ian because PWM is a varying voltage, not a resistor. Yes, I know I can limit a current by switching a circuit on and off with PWM, but that isn't a real resistor. What I mean is like a thermister but instead of varying with temperature, varying with voltage.
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
oh, and i'll put this here again too!
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
![](http://s8.postimage.org/4j7ysjng1/Untitled.jpg)
click for bigger